Blowing system for furnaces.



H. PUETTER.

BLOWING SYSTEM FOR FURNACES.

APPLICATION FILED MAY 8. 1914.

1,141,652. Patented J fine 1, 1915,

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H. POETTER.

BLOWING SYSTEM FOR FURNACES.

APPLICATION FILED MAY 8, 1914.

1,141,652. Patented June 1, 1915.

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' vprises a double valve for the steam supply n rrpa,

BLOWING SYSTEM FOR FURNACES.

Specification of Letters Patent.

Patented June fl, 1915.

Application filed May 8, 1814. Serial No. 837,210.

To all whom it may concern Be it known that I, I-IEINRIGHVPOETTER, a subject of the King of Prussia, residing at 126 Grafenbenger Allee, Dusseldorf, Germany, have invented certain new and useful Improvements in Blowing Systems for Furnaces, of which the following is a specification, reference being had to the accompany ing drawings.

This invention relates to a method of and apparatus for the working of furnace installations and more especially of gas generators, by means of which a steam jet air injector is automatically put in operation immediately the fan of the blowing device, from any cause, is thrown out of action. By this means explosions in the air spaces of the generators due to the backward flow of the gas into the air space are prevented, while moreover explosions in the gas pipes themselves due to the fact that, when the blowing device is stationary, v atmospheric .air may be drawn into the pipes through the cooling of the gas are likewise prevented.

The construction of the blowing device is such that when started again, the steam jet injector isiautomatically again put out of action, an arrangement which considerably facilitates the change from one method of working to the other, hitherto by no means free from danger, and entirely does away with .all possibility of danger to the attendants operating the generators and furnaces.

,An arrangement in accordancewith this invention is illustrated in the accompanying drawings, wherein Figures 1 and 2 illustrate alternative arrangements of apparatus, the various valves beingshown in section.

, The arrangementshown in Fig. 1 compipe, consisting of a pair of suitably adjusted valves a and b which arealmost completely balanced or relieved from .pressure' The valve or permits of the flow of steam through the pipe cto the air space of the generator. The steam thus added to the air supply from the blowing. device may be styled additional steam and will flow through the valve a and the pipe 0 so'long asth-e blowing device is in operation, while the valve 7) through which the steam jet in: jector is supplied, remains closed. The valves a and b are controlled by means of two bells d and e, which work in cisterns 03,, d

containing liquid, connected by means of supply pipe 2' of the steam jet injector. The

bells d e are suspended by links (l2, e, from the arms (Z 6 of a lever carried by a shaft (Z, and on this shaft there is also secured a lever (Z from the extremities of which the valves a b are suspended. So long, therefore, as the pressure in these air supply pipes exceeds the maximum gas pressure of the furnace plant, the bell cl will remain in the position shown in the drawing, and consequently the valve a will remain open and the valve b closed. An adjustable weight 70 is provided on the arm (Z by means of which the operation of the bells can be suitably regulated in accordance with the working conditions. When now from any cause whatever, such for instance as the failure of the electro-motor Z due to short-'circuiting, the failure of the coupling m or the like, the pressure beneath the bell (Z falls this bell, on account of the fact that its weight exceeds that of the bell 6, will be forced into its lowest position, with the result that the steam jet injector 2' will immediately become operative through the opening of the valve Z), whereby the flap valve n will be reversed through the lateral air pressure exerted from the direction of the injector, so that the sliding surface at 0 is moved beyond the aperture at 79. To facilitate the rapid action of the flap valve, it is important that the bell should be raised by the blast from the injector into its highest position, before the flap valve n has been rotated beyond its central position, so that the valve 6 may be promptly opened and the full pressure may be exerted on the valve n. As soon as the flap valve n has been moved beyond its central position, a suitably arranged counterweight 9 turns it into itsextreme position whereuponthe blast from the steam jet in- "jector can flow freely through the aperture In someinstances, as shown in Fig. 2,

there may be substituted for the two bells d and e an electro-magnet 1" so connected with the circuit of the electro-motor Z of the blowscribed.

ing device that so long as the magnet receives current, its armature s is drawn in and the valve a is opened and consequently the valve I) closed, while upon the failure of the current supply and the consequent stoppage of the motor, the magnet becomes deenergized, and its armature 8 falls under the action of the counterweight 70, thereby closing the valve a, opening the valve b, and causing the flap valve n to be actuated in the manner and with the result already de- The reversal of the movement and of the action of the valves can also be effected without any trouble whatever, as the magnet, as soon as it is'again supplied with current, attracts its armature and consequently renders the steam et in ector inoperative while the normal air pressure is again supplied by the blowing device.

From the foregoing descriptionit willbe 7 obvious that apparatus in accordance with this invention may easily be applied to entire groups of generators having a common blowing device and gas collecting flue. What I claim is:

' 1. In a furnace installation the combina- .:ti0n'of a blowing device adapted to be Copies of this patent may be obtained for delivery pipe.

2. In a furnace installation the combination of a blowing device adapted to be driven by power with a second blowing device adapted to be actuated by a steam jet, means whereby, upon thefailure of power supply to the firstmentioned blowing device, steam can be automatically supplied to the second blowing device thereby maintaining the blast, blast'pipes leading from said blowing devices-to a common blast delivery pipe and at the junction of saidblast pipes and delivery pipe, a flap valve adapted,

when subject to excess of pressure in one of the blast pipes to close the passage between the other blast pipe and the delivery pipe.

*3. In a furnace installation, the combination ofi a blowing device adapted to be driven by power with a second blowing device adapted to be actuated bya steam jet, a valve chamber, a steam pipe'communicating therewith, a lever mounted to oscillate within said valve chamber and connected to ashaft extending to the exterior of said; chamber, valves carried by the arms of sald lever, one of said valves being adapted when unseated to supply steam to the blast from the first'mentionedblowing device andthe other of them when unseated to supply steam to said jet, seats for said valves within said chamber, a second lever connected to said shaft externallyof said chamber, bells carried by the arms of said second lever,

cisterns containing liquid, wherein said bells j are partially immersed, blast; pipes leading from said blowing devices to a common blast delivery pipe, at the junction of said blast pipes and delivery pipe, a flap valve adapted, when subject to excess of pressure inone of the blast pipes, to close the passage between the1other blast pipe and the delivery pipe, and pipes connecting said blast pipes with the interiors of said bells above the level of liquid insaid cisterns.

4:. In a furnace installatiomthe combination of a blowing device adapted to be a driven by power with a second blowing de'-' w vice adapted to be'actuated by a 'steamjet, a, valve chamber, a steamfpipe communicating therewith, a lever mounted to oscillate within said-valve chamberand connected to a shaft extendingto the exterior of said' chamber, valves carried by the arms of said lever; one of said valves being adapted when unseatedto supply steam to the blast from the first mentioned blowing device and the other of them when unseated to'supply steam to said jet, seats for said valves within said chamber, a second-lever connected to said shaft externally of said chamber, a counterweight on said second lever, and means adapted to raise said lever and counter- 1 weight when the first mentioned blowing de vice is operative, but to allow said 'lever to descend under the action" of said weight when the said blowing device is inoperative, the first mentioned lever andthe valves care 'riedthereby' being thus simultaneously and correspondingly operated.

In testimony whereof If have hereunto affixed my signature inthe presence of two witnesses. 4

- 7 HEINRICIIPO 'TTERVL [1 8.] Witnesses:

HELEN NUFER, F. Norma.

five cents each, by addressing the commission'er 01' Patent, Washington, D. 0. V l 

